Fire burning at N. California refinery

RICHMOND, Calif. (AP) -- Residents in two Northern California cities are being told to shelter-in-place because of a fire at a Chevron refinery in Richmond.

An official with the Contra Costa County Health Services says the fire, first reported at 6:40 p.m. Monday, is burning in a process unit at the facility. It is emitting black smoke over the cities of Richmond and San Pablo.

Randy Sawyer says it's not known what sparked the blaze. No injuries have been reported.

An automated phone message sent out by the health agency says that there was an emergency at the refinery.

Television shots show large flames with thick black smoke coming out of at least two refinery stacks at the facility.